package net.yla.smartbus.core.base;

import net.yla.smartbus.core.util.RedisUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author KongXianDe
 * @date 2019/5/15 16:53
 */
@ServerEndpoint("/websocket/{token}/{userIdentity}")
@Component
public class WebSocketServer {

    private RedisUtil redisUtil;


    private static Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;

    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
//    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<>();
    private static ConcurrentHashMap<String, WebSocketServer> webSocketSet = new ConcurrentHashMap<>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session, @PathParam("token") String token, @PathParam("userIdentity") String userIdentity) throws Exception {
        this.session = session;
//        webSocketSet.put(fromAccount, this);     //加入set中

        addOnlineCount();           //在线数加1
        log.info("有新连接加入！当前在线人数为" + getOnlineCount());

        try {
            sendMessage("连接成功");
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除

        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) throws Exception {
        log.info("来自客户端的消息:" + message);
//        SendMessageForm form = JSONObject.parseObject(message, SendMessageForm.class);
//        mimcService.sendMessage(this.user, form);
    }

    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 发送消息
     * @param message
     * @throws IOException
     */
    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }

    /**
     * 发给指定用户
     * @param message
     * @param fromAccount
     * @throws IOException
     */
    public void sendtoAccount(String message, String fromAccount) throws IOException {
        if (webSocketSet.get(fromAccount) != null) {
            webSocketSet.get(fromAccount).sendMessage(message);
        } else {
            //如果用户不在线则返回不在线信息给自己
            sendtoAccount("当前用户不在线",fromAccount);
        }
    }
//    /**
//     * 群发自定义消息
//     * */
//    public void sendInfo(String message) throws IOException {
//        log.info(message);
//        for (WebSocketServer item : webSocketSet) {
//            try {
//                item.sendMessage(message);
//            } catch (IOException e) {
//                continue;
//            }
//        }
//    }

    /**
     * 获取登陆的小米账号
     * @return
     */

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
}
